Door for horizontal chamber ovens for the production of gas and coke



i July, 1937- P. VAN ACKEREN 2,085,775 DOOR FOR HORIZONTAL CHAMBER OVENS FOR THE PRODUCTION OR GAS AD` COKE Filed sept. 2s, 1935 l2 sheets-sheet 1 July 6, 1937. P. VAN ACKEREN DOOR FOR HORIZONTAL CHAMBER OVENS'FOR THE PRODUCTION OF GAS AND COKE.

2 sheets-sheet 2 Filed Sept. 25, 1935 Patented July 6, 1937 UNITED FFIE.`

DOOR FOR HORZONTL CHE.

,il OVENS FOR THE PRODUCON 0F GAS AND COKE Delaware Application September 23, 1935, Serial No. 41,705 In Germany September 25, 1934 5 Claims.

The invention relates to doors serving to close the lateral openings of horizontal chamber ovens for the production of gas and coke and in particular to doors which are packed by means of a metal frame, connected with the rigid door body by means of an elastic metal diaphragm, which is pressed against the door frame.

In order to pack the chamber opening securely by means of the door it is necessary that the packing frame, preferably provided with a bevelled front edge, is pressed firmly against the front side of the door frame and a-buts tightly against the door frame over its entire circumference. As the door frame is never completely level and often becomes warped after a certain operative period the packing frame of the door must be constructed in such a Way that it Vcan easily be brought'into a shape which corresponds to the existing course of the face of the door frame. In order to make the packing frame adjustable against the rigid door body Without inuencing the tightness of the door it has been proposed to connect the packing frame with the door by means of an elastic metal diaphragm of thin sheet metal.

VIn certain doors constructed with such a metal diaphragm the diaphragm has been cut out in the form of a frame but has the disadvantage that the packing of the diaphragm on the door body is not permanent and is produced with difficulty.

It has in addition been proposed to use, instead of a frame diaphragm, a sheet metal ap to connect the packing frame with the door body. The sheet metal platewas thus fastened iirmly outside on the door body. This latter suggestion has not been able to be carried out as the sheet metal plate often warps on account of the unavoidable heat during operation and nally breaks where the sheet metal plate is fixed to the door body.

The object of the present invention is to provide improvements in the doors used for horizontal chamber coke ovens which exhibit a packing frame connected with the rigid door body by means of an elastic metal diaphragm, so that a permanent and also completely tight connection is produced between the movable packing frame and the doorV body.

For this purpose according to my invention, I provide on the coke oven door for connecting the packing frame with the rigid door body an elastic sheet metal ap extending over the whole door, which is rmly connected on the edge with the said packing frame and whichV is movably xed to the door body, and in addition, in theV (Cl. Zim-248) intermediate space between the door body of the sheet metal plate, a layer of an insulating matetaken on the line I-I of the coke oven door shown inV Fig. 3 and constructed in accordance with the invention Fig. 2 shows a vertical section through the door according to Fig. 1 and Fig. 3 is a front elevation of the door.

On the drawings I indicates the coke oven chamber, whose lateral opening is closed by the door. The coke oven chamber I is built of Alireproof brickwork 2 which is covered on the outside by a metal casing 3.

About the door opening the casing 3 has projections i behind which heads 5 of fixing screws 6 are placed. The nuts 'I are provided on the screws S which with the assistance of the plateV springs 8 serve to fasten the door frame 9, preferably made of cast iron, to the brick Work casingi.A

The door frame has for this purpo-se'on the lcir- Y cumference a row of fork shaped projections II),

(as can be seen from Fig. 3) in which the screws 6 are arranged. The joint between the door v' frame and the casing 3 is packed byv means of anV asbestos band II or the like.

The door frame 9 has in conformity with the door opening a projecting part I2, on the outside of which a flat surrounding seating-surface i3 is provided. The door itself iscomprised of an inner plug-section, an outer rigid frame-section, and an interposed flexible sheet-metal platesection. The inner plug-section is formed of a metal backing plate I4 which is rmly connected with the angle irons I5 to side frame parts I6 which latter are preferably sub-divided as indicated in dotted lines at I6 in Fig. 2.' The'frame i6 has at the end inwardly directed edge projections II al1 of which serve to hold the rebrick inner lining I8 of the door. The lining I8 extension 2l is provided which has an opening 23, closable by means of the cover 22, for insertion and removal of the levelling bar which levels the chamber charge. The levelling b-ar is not illustrated in the drawings.

Two pedestal bearings 24 are provided on the outside of the door plate I4 for the door-machine grips for opening and closing the door. The pedestal bearings 24 have a circumferentially projecting base plate 25. In addition they each c-arry on the outside a rotatable cross bar 2S which are hingedly connected with each other by means of a link bar 2T so that they can be operated simultaneously. The cross bars 26 are placed behind hooks 28, fixed on the door frame when the door is in the closed position.

The pedestal bearings 2li support a built-up rigid outer metal frame-section comprising individual angular shapes in which the sides are formed as an angle iron frame 23 whose side 3G circumferentially follows the contour of the door as clearly shown in Fig. 3. The frame 23 is connected -with the pedestal supports 24 by cross-connecting -angular structural shapes as by means of bars 3|.

Between the frame 29 and the door plate there is arranged a packing plate or frame 32 in the form of a diaphragm which is interposed between the inner-section and the outer-section of the door, is carried by the inner-section, and covers the whole of the doorway and consists of fine sheet metal or any other suitable elastic metal diaphragm. Only in the region of the pedestal supports 24 and the case like extensions 2i in which the levelling bar opening is provided, has the plate 32 out out portions. The plate 32 is fixed by clamping to the base plate 25 on the pedestal supports 23 by means of the clamping screws 33 which are provided on the cross bars and projections of the frame 29 forming a part o the outer rigid frame-section of the door. 'Ihe cut out portions of the diaphragm plate 32 and the pressure which the clamping screws 33 exert are selected in such a way that a restricted relative movement of the margin of the diaphragm plate is possible with respect to the door frame 9 and the inner-section of the door. On this account the diaphragm plate can be tightened or loosened by the pressure screws 33 to determine the degree of tautness with which the plate -is held on the door body allowing for some yieldsurface I3 in order to pack the door for metalto-metal self sealing. In order to keep the frame 33 tightly against the seating surface I3 on the entire circumference of the door frame, even if the packing seating surface i3 is not completely level, a row of adjusting screws 35 are provided on the frame 29 on the door within the region of the packing frame 313. With the help of these xing screws the restricted elastic frame 34 can be brought into such a shape that its bevelled edge accurately follows the packing seating surface I3. On account of this a very eicient packing of the door opening is produced, and furthermore, in the practical use of the door during the coking of a chamber charge oi coal, tarry constituents often condense on the packing edge or bevelled packing seating surface i3 of the door frame and close up the small cracks, which are only the fraction of a millimetre in width.

As can be seen from Figs. 1 and 2 the packing frame 34 supports on the inside a exible tongue 33 whose inner free end rests on the plug-section framework i6, 2| and I9 in the region of the door plate M. This tongue closes the intermediate space between the region of the door plate i4 and the diaphragm plate 32 so that a poor heat-conducting material, for example an asbestos packing, can be arranged in this intermediate space, as shown at 31. The asbestos packing protects the diaphragm 32, which is important for the tight fitting of the door, from the heat of the coking chamber and increases the life of the diaphragm.

It should also be mentioned that the door constructed according to the invention can be provided with the usual clay packing instead of a metal packing. For this purpose the junction 38 between the part l5 of the door and the door frame 9, as can be seen from Fig. 1, is made in the shape of a' wedge. If the door is to be provided with a clay packing the frame 29 and the diaphragm plate 32 are taken from the door. The junction 33 is then free and the packing clay can be placed in this junction.

I have described my invention above with reference to one form of construction but without limiting the invention to that described. The invention may furthermore be varied as desired within the scope the following claims.

1. A self-sealing door for coke-oven chambers comprising an inner plug-section, an outer rigid frame-section and an intermediate flexible sheetmetal plate-section; the inner plug-section comprising a metal backing plate firmly connected with a liner retainer for refractory liner brick and substantially coextensive with the Whole 0f the liner brick, a foot part for supporting the door in the chamber, and door securing pedestal bearings rmly secured to said backing plate; said outer rigid frame-section being secured to and carried by the pedestal supports and said intermediate flexible plate-section being mounted on and carried by the inner plug-section; said intermediate plate-section being in the form of a continuous diaphragm extending over the whole area of the door and terminating at its margins in an inwardly extending metallic sealing edge; said diaphragm plate being fixed on the innersection by securing means arranged on parts of the outer frame-section but only in the region of the vertically extending middle area of the diaphragm plate remote from margins and with the securing means conned to restricted zones which are remote from each other vertically along the diaphragm and said diaphragm being thereby held in spaced relation from the outer rigid frame-section for dissipation of the marginal bending strains throughout the same, and adjusting screws on the outer frame section in the region of the marginal edges of the diaphragm for adjusting the sealing edge.

2. A Vdoor as claimed in claim 1, and in which the diaphragm is provided with cut-out portions through which devices project including the pedestal bearings and in which the restricted zones for the securing means are limited to the margins of the cut-out portions and also toa zone near the upper and a zone near the lower ends of the diaphragm.

3. A door as claimed in claim 1, and in which the diaphragm is provided with cut-out portions through which devices project including the ped-v estal bearings, and in which the securing means are clamping screws, and in which the restricted zones for the securing means are limited to the margins of the cut-out portions and also to a zone near the upper and a, Zone near the lower ends of the diaphragm.

4. A door as claimed in claim 1, and in which the entire diaphragm isV arranged at a distanceV the door and connected with the backing plate 10 by angle irons.

PAUL VAN ACKEREN. 

